Interactive Ottawa Knee Rule calculator. Requires the calculator gadget.
Usage: {{Ottawa Knee Calculator}}
Ottawa Knee Rules
Ottawa Knee Rule
| Criteria
|
No (0)
|
Yes (+1)
|
| Age ≥55 years
|
1
|
|
| Tenderness at head of fibula
|
1
|
|
| Isolated tenderness of patella (no other knee bone tenderness)
|
1
|
|
| Inability to flex to 90°
|
1
|
|
| Inability to bear weight (4 steps both immediately and in ED)
|
1
|
|
| Criteria Met
|
/ 5
|
| Interpretation
|
| 0
|
X-ray NOT indicated — No Ottawa Knee Rule criteria met. Sensitivity 98.5% for fracture.
|
| ≥1
|
X-ray indicated — One or more criteria met; obtain knee radiographs to evaluate for fracture.
|
| References
|
- Stiell IG et al. Prospective validation of a decision rule for radiography in acute knee injuries. JAMA. 1996;275:611-615. PMID 8594242.
- Stiell IG et al. Implementation of the Ottawa Knee Rule. JAMA. 1997;278:2075-2079. PMID 9403421.
|
